YAG Etalons

High Index, damage resistant etalons ideal for intra-cavity line narrowing

YAG etalons (or yagalons)

Solid YAG etalons are handy because the high index of YAG material (about 1.8 depending on wavelength). This creates a reasonably high finesse without any coating; this makes "yagalons" excellent for mode selection in high power solid state lasers. The additional advantage of YAG is excellent transmission in a wide range a wavelengths.

Material: Undoped YAG

Wavelength range: 250nm to 4um

Wedge: Less than 1 arc second typical

Clear aperture: 85% of outside dimension

Surface quality: 10/5 or better

Matched surface figure: λ/50

Diameter: 5.0mm or 1/2"

Finesse and FSR vary with wavelength, Finesse ~ 1, FSR on the PDF drawings is based on an index of 1.82

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